Equipment Operates But Does Not Provide Cooling - Daikin SkyAir RZQ200 · 250C7Y1B Service Manual

Troubleshooting Based on Equipment Condition
2.6

Equipment Operates but does not Provide Cooling

Applicable Model All models of SkyAir series
Error Detection
Method
Error Generating
Condition
Possible Cause
90
Overcurrent relay (for compressor)
Compressor protection thermostat
Overcurrent relay (for compressor) may act due to the following reasons
Lower voltage of power supply
Excess level of high pressure
Insufficient size of power cable
Malfunction of compressor
Compressor protection thermostat may act due to the following reasons
Internal leakage of four-way valve (There is no difference between suction and discharge
temperature)
Insufficient compression of compressor
Incorrect refrigerant
Faulty expansion valve
Insufficient circulation of refrigerant
SiBE26-701
Troubleshooting